Vapor generator



E. F. FISHER VAPOR GENERATOR Dec. 3, 1929.

Filed June 10, 1926 M/ Vf/VTO e: Ernesz fJFzs/zer.

Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE ERNEST I. FISHER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE PROSI'ERITY COMPANY INC., SYRACUSE, NEW YORK, A CORPORATION OF YORK vA ron GENERATOR A Application filed June 10,

My invention has relation to improvements. in steam generators and consists in the novel features of construction more fully set forth in the specification and pointed out in the claims.

The present invention is more specifically an improvement over the structure described in my Patent No. 1,600,220, granted September 21, 1926, and has for its principal object the arrangement of the water container and burner in such manner as will cause the flame from the burner to impinge directly on the body of water in the container so as to increase the speed of steam generation therefrom. A further object of the invention is to apply the heat to the top of .the body of water and cause the hot gases to move downwardly through flues in the water container so that the temperature of the gases will-be highest at the point where the water in the container is hottest, thereby raising the temperature of the steam that is generated. A further object is to cause the superheated steam to traverse a casing together with the products of combustion so as to effect an intimate mixture of the gases as they pass to the outlet from the casing. Further and other advantages will be better apparent from a detailed description of the invention in connection with the accompanying drawings, in which- Fig. 1 is a combined side elevation and vertical, longitudinal section of my improved steam generator; Fig. 2 is a horizontal cross section taken on the line 22 of Fig. 1; and Fig. 3 is a detached view of the controlling device for maintaining a substantially constant level of water within the water container; Fig. 4 is a longitudinal middle section through the feed-valve for supplying water to the-water container; and Fig. 5 is a cross sectional detail taken on the line 55 of Fig. 4.

Referring tothe drawings, 1 represents a suitable cylindrical casing having a conical top 2 from which leads an air intake pipe 3 provided with a damper 4. The casing l is mounted on a plurality of legs 5 and is covered with a layer of asbestos 6 or other suitable insulation. Disposed within the 1926. Serial No. 115,011.

upper part of the casing 1 and resting on a I plurality of brackets 7 fixed to the inside of the casing wall 1s a water container 8 traversed by vertically disposed flues 9, said flues being securely fixed in the bottom 10 of 55 the container and held in spaced relation at the open top of the container by spacers 11 between the outermost flues and the con tamer wall and spacers 11' between adjacent flues. A cylindrical burner 12 is mounted immediately above the container 8, said burner being supported at the inner end by a bracket 13 and the outer end by the container wall. The burner is provided with an air intake opening 14 and with a gas feed nozzle 15 to which is connected 2. gas supply pipe 16 having a gas control valve 17. A pipe 18 is connected to the pipe 16 and leads downwardly on the axis of the burner 12 to a point slightly below the side thereof having the open orifices 12, and the extremity of the pipe 18 is perforated so as to permit gas to issue therefrom to serve a pilot light for the burner 12. The air intake opening 14 of the burner 12 is provided with a valve 19 by which the air supply to the burner may be controlled. Below the water container 8 and spaced about midway between the bottom thereof and the bottom of the casing 1, is a screen partition 20 between which and the bottom of the container 8 is packed a suitable gas filtermaterial 21 such as copper wool, and below the screen 20 is a funnel shaped partition 22 having a central opening 23- which serves as an intake for a horizontally 'disposed fan 24 mounted on a shaft 25 below the partition 22. The shaft 25 is coupled to the shaft 26 of a motor 27 which serves to drive the fan 24 and thereby exhaust air and steam throu h the casing 1 and to the outlet 90 28 from sai casing.

In order to maintain the water level within the container 8 constant, I provide a feed water control comprising a conical receptacle 29, connected to a valve plug 30 by a pipe 31. 95 The plug 30 is provided with an axial port 32 communicating with the pipe 31 and with a pipe 33 leading to the container 8. The valve 30 is rotatably mounted within a casing 34 connected to which is a supply pipe 35 1 adapted to communicate with a port 36 within the valve plug 30, said port 36 also being in communication with the port 32. Projecting from the fitting 37 carrying the receptacle 29 in a direction opposite to said receptacle, is a bar 38 on which is slidably mounted a coun-' terweight 39, said counterweight being provided with a set screw 40 whereby it may be held in any desired position on the bar 38.

In operating the generator, the valve 17 is opened to admit gas to the burner 12 which is lighted by the pilot light at the end of the pipe 18, after which the fan 24 is set in motion to draft air through intake pipe 3 and cats ing 1. The flame from the burner 12 will then be drawn downwardly into contact with the water in the container 8, the products of combustion assing downwardly through the flues 9 and ter material 21 under the influence of the exhauster 24. As the hot gases pass through the flues, they will impart a large amount of their heat to the water in the a water container disposed within said casing, a plurality of flues traversing the water container, 0. burner disposed above said container and arranged so that the flame therefrom will impinge on the water within the water container, a gas filter bed disposed below the water container, said casing havin an air inlet and an outlet for the steam an products of combustion, an exhauster below the water container to draft the generated steam and products of combustion downwardly through the flues to said outlet, and means for supplying water to the container and maintaining a substantially constant level therein.

In testimony whereof I hereunto aflix my signature.

ERNEST F. FISHER.

container 8, and as they pass through the filter material (which is preferably a metallic substance) they will impart a large amount of their heat to the filter. In applying the flame to the top of the Water (which is the hottest) the steam is heated to a high temperature as soon as it is formed, and is exhausted downwardly through the flues and heated filter material together with the hotproducts of combustion. Thus the high temperature of the steam is sustained as it passes through the casing 1 to the outlet 28.

As the water is evaporated, the level within the container 8 lowers, and with it the level within the receptacle 29 until the counterweight 39 overbalances the receptacle and causes it to swin to the upper (dotted) position shown in ig. 3. As the receptacle moves to the upper position, the valve 30 rotates to bring port 36 in register with pipe 35 when th feed water will flow into both the receptacle 1 9 and container 8. As soon as the receptacle overbalances the counterweight 39, the receptacle will rotate the valve 30 to shut off the supply from the pipe 35. In this manner, the level of water within the container 8 is maintained practically constant.

Having described my invention, I claim:

1. A steam enerator comprising a casing, a water container disposed within said casing, a plurality of flues traversing the water container, a burner disposed above said container and arranged so that the flame therefrom will impinge on the water within the water container, said casing having an air inlet and an outlet for the steam and products of combustion, an exhauster below the water container to draft the generated steam and products of combustion downwardly through the flues to said outlet, and means for sup plying water to the container and maintaining a substantially constant level therein.

2. A steam generator comprising a casing, 

